Can I overclock RAM over my CPU memory clock

tapak

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I got a B250 motherboard with a 6600k. The 6600k base memory clock is 2133 MHz, and I want to overclock my RAM at 2666 MHz. Is this a possible thing?

I enabled XMP but now I don't want to mess around and screw everything up.

Thanks
 

avatar_of_tenebrae

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check this web page yourself:

https://ark.intel.com/#@Processors

INTEL HAS SAID AGAIN AND AGAIN THAT IF THEY LIST 2133, THEY MEAN 2133, and not to listen to those who say otherwise ;)

it lists the memory that works with your processor out of the box. intel updates do make a difference however: if your not yet running your not yet updated what matters.

your motherboard effects what memory will work: check your manufacturer's memory support chart too. ditto: updates matter but only if you've already run the updates... if your building a system you can't yet have updated.

it's good you got a B250 but did you get an Intel made B250 or an Asian made B250? (quality matters, but it true intel made motherboard costs a little more)

some boxed processors have AUTOMATIC HEAT CONTROL: you don't have to overclock them. they run at the speed profile you select at the most advantageous way - it makes overclocking irrelevant (cooling is still relevant, but the processor does all the O/C that's wise and possible). did you get at "locked" or "unlocked" OC intel cpu?

now as for over-clocking, if it's possible, it's a complicated issue if you SHOULD (this is why intel's automatic cpu speed is better). if you O/C your running hotter which means it will be sooner you'll have to wait for cool-down. it's pretty obvious you can't control this dynamically like the cpu can

so: you can (if it lets you) overclock the memory: but it would be less reliable and hotter (the memory or the cpu) - causing more wait periods - which might end up SLOWER

INTEL HAS SAID AGAIN AND AGAIN THAT IF THEY LIST 2133, THEY MEAN 2133, and not to listen to those who say otherwise ;) check that URL. believe it.
 


You almost sound like you are trolling.
Intel stopped making motherboards years ago.
Anything past DDR4 2133 with a 6th-gen CPU is considered overclocked; but we run overclocked RAM all the time.
Motherboard chipset determines how fast you can run your memory. CPUs play a small factor in it, but most i5 and i7 CPUs can run over 3200MHz memory and higher if given a motherboard that can handle it.
The B250 chipset officially supports DDR4 2400 and there is no overclocking on that chipset.
So, regardless of CPU you can run DDR4 2400.
 

avatar_of_tenebrae

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https://ark.intel.com/#@Processors

the url shows what intel allows, as i said

and as I said, intel has an article specifically stating that they get many questions if they are not serious about their ratings: and the answer is THEY ARE

what i said about MB is that he/she needs to check the chart for the board/model and also take that seriously. i also likely said "true intel made boards" are higher quality than other boards "which have intel chipset".

then i also said that "cpu and or motherboard updates" can alter abilities: but you can't do that until AFTER you can access updates (which you can't do if your assembling a pc from parts). in this case he can run slower until then (assuming there even is an update). but he/she shouldn't get the idea that he can buy parts that are not labeled to work together and update after installation: since that isn't always possible.
 

Karadjgne

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B250 officially supports 2133 because that's the speed of the MC in an intel skylake processor. However, with the release of kabylake, the bios was updated to 2133/2400 because 2400 is the speed of Kabylake default MC. But thats as far as Intel has certified plug and play, out of the box, guaranteed supported and guaranteed to work. The mobo's will support faster ram, but Intel will not guarantee support in that in any way, as it's faster than certified. On some mobo's, Z especially, faster ram is supported by (OC), which has 2 possible meanings. Either the ram needs OC via xmp or manual settings to improve clocks past the 2133/2400 default speed OR to maintain stability at ram rated speeds the cpu might require some OC values, as in a bump to mc voltages and/or cpu clock speeds.

Xmp is a ram setting (eXtreme Memory Profile) where voltages/timings/clock speeds are automatically used as they are written directly from the ram. It's a profile that's not user changeable. So you can't break it. If you change anything, you are no longer using xmp, so even if you mess up, you can always return to xmp.

Considering the tiny amount of impact ram clocks have on Intel cpu's, set xmp and forget about higher, it's realistically unimportant.
 

tapak

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my motherboard is a Gigabyte B250-D3H,
 


Yes your motherboard is legit and supports DDR4 2400. If enabling XMP doesn't make it run at 2400 then you'll have to manually set memory speed to 2400 to get the most out of your RAM.